Paving stone



FIG. 1 is a top perspective view of a paving stone according to an embodiment of the design.

FIG. 2 is a top view of the design of FIG. 1.

FIG. 3 is a bottom view of the design of FIG. 1.

FIG. 4 is a right side view of the design of FIG. 1; and,

FIG. 5 is a front end view of the design of FIG. 1. 

CLAIM The ornamental design for a paving stone substantially, as shown and described. 